How to Choose a Hoodie: The Complete Buying Guide
Most people buy a hoodie the same way they buy anything else online — by price, by brand recognition, by how it looks in a product shot. The fabric composition label is an afterthought. It shouldn't be.
This guide covers every variable that determines whether a hoodie is worth keeping. GSM, yarn construction, fleece type, fit, hood build, seam quality, finishing process. By the end, you will know exactly what to look for — and what most brands are hoping you don't ask about.
The buying framework
A hoodie is a construction problem. Every decision made during production — fibre, yarn, fabric weight, seam type, finishing — determines what you receive and how long it lasts. Branding is applied after those decisions are made. It does not change them.
The framework for choosing a hoodie is simple: start with fabric weight, verify yarn construction, confirm fleece type, assess fit, inspect seam quality, understand the finishing process. In that order. Price is the last variable, not the first.
Fabric weight — what GSM means
GSM stands for grams per square metre. It is the standard measure of fabric weight. A higher GSM means more fabric mass per unit area — a denser, heavier, more structured garment.
| GSM Range | Classification | Typical brands |
|---|---|---|
| 180–260gsm | Lightweight | Fast fashion, basics ranges |
| 280–320gsm | Midweight | High street, most branded hoodies |
| 350–380gsm | Heavyweight | Premium independents |
| 400gsm+ | Premium heavyweight | Reigning Champ, echelonn., select independents |
If a brand does not publish the GSM of their hoodie, assume it is below 320gsm. Brands that build at weight know it is a selling point. They state it.
Yarn construction — ring-spun vs open-end
Fabric weight tells you how much cotton is in the garment. Yarn construction tells you what quality that cotton is.
Ring-spun cotton is produced by continuously twisting and thinning cotton fibres before spinning them into yarn. The result is a tighter, smoother, stronger yarn. At 400gsm, ring-spun construction produces a fabric that holds its structure, resists pilling, and softens progressively with washing rather than degrading.
Open-end spun cotton is faster and cheaper to produce. The fibres are not twisted as tightly — the yarn is coarser, weaker, and more prone to pilling under abrasion. At equivalent GSM, open-end spun fabric feels rougher and degrades faster. The Textile Institute classifies ring-spun as demonstrably superior in tensile strength and abrasion resistance.
Fleece construction — loop-back, French terry, polar
Loop-back fleece has a smooth knit face on the outside and an uncut looped interior. The loops trap warm air and create the characteristic soft hand feel of a quality hoodie. At 400gsm, the loop structure is dense enough to provide meaningful insulation. This is the construction used in premium heavyweight hoodies.
French terry has smaller, tighter loops on the interior — lighter weight, less insulation, faster drying. It is the correct choice for a lighter hoodie or sweatshirt worn in mild conditions. It is not a substitute for loop-back at heavyweight.
Polar fleece is synthetic — typically polyester. It is brushed rather than looped, lightweight, and fast-drying. It pills over time and does not breathe. It is not a cotton construction and should not be compared directly to loop-back fleece.
Fit — oversized, regular, slim
Fit is a design decision, not a quality indicator. What matters is that the fit is intentional and consistent across sizes.
An oversized hoodie is characterised by a dropped shoulder seam — the shoulder seam sits below the natural shoulder point — an extended body length, and a wider chest and sleeve. At 400gsm, an oversized fit drapes with authority. The fabric weight prevents the garment from looking shapeless.
A regular fit follows the body more closely. The shoulder seam sits at the natural shoulder point. Sleeve length and body length are proportional to chest width. This is the standard construction for most hoodies.
A slim fit is cut closer to the body throughout. At heavyweight GSM, slim fit can feel restrictive — the fabric mass works against close-cut construction. Most premium heavyweight hoodies are cut oversized or regular for this reason.
Hood construction
The hood is the most structurally complex part of a hoodie. A well-constructed hood has a centre seam running from the front opening to the back — this seam creates the three-dimensional shape that allows the hood to sit correctly on the head rather than collapsing flat.
Drawstring placement matters. A drawstring threaded through a channel at the front of the hood opening sits correctly and adjusts evenly. A drawstring threaded through the body of the hood rather than the channel will pull unevenly and distort the hood shape over time.
Metal grommets at the drawstring exit points are a construction detail that indicates quality. Fabric-only eyelets fray. Metal grommets do not. They are a small detail that signals attention to the full construction, not just the visible surface.
Seam and stitch quality
A flatlock seam joins two fabric edges flat rather than folding one over the other. The result is a seam that lies flush against the fabric surface — no raised ridge, no bulk, no pressure point against skin. On a heavyweight hoodie worn close to the body, flatlock seams are the correct construction choice.
Double-needle stitching on hems and cuffs adds durability. Two parallel rows of stitching distribute stress across a wider area — the hem is less likely to unravel under repeated washing and wearing. Single-needle stitching on a hem is a cost-saving decision, not a construction one.
Inspect the stitching density. More stitches per inch means more thread holding the seam together. A seam that looks clean from a distance may have low stitch density — it will open faster under stress.
Finishing — garment dyeing, enzyme wash, preshrinking
Finishing is what happens to the garment after it is sewn. It determines how the piece arrives and how it ages.
Garment dyeing submerges the finished garment in a dye bath after assembly. The dye penetrates the cotton fibres directly, producing tonal variation — seams absorb colour differently to panels — and a lived-in finish that no pre-dyed fabric can replicate. It also preshrinks the garment: the heat and agitation of the dye drum forces the fibres to contract before the piece reaches you.
Enzyme washing breaks down surface fibres after dyeing, softening the hand feel and creating a slightly irregular texture. This is not a defect. It is the process working correctly.
A garment that has not been preshrunk will shrink on first wash. At 400gsm, that shrinkage can be significant — 5–8% in length and width. A preshrunk garment holds its dimensions. The size you order is the size you keep.
Colourway and longevity
Tonal colourways — washed black, stone, grey — age better than saturated colours. The fading that occurs with repeated washing reads as character on a washed black garment. On a bright red or cobalt blue, the same fading reads as degradation.
Garment-dyed colourways are inherently tonal. The dye settles unevenly into the construction — darker in the seams, lighter on the panels — creating variation that deepens rather than diminishes with wear. This is the correct aesthetic for a heavyweight basic intended to be kept for years.
Cotton Incorporated research confirms that 100% ring-spun cotton retains colour better than cotton-polyester blends over repeated washing, due to higher dye uptake at the fibre level. The colourway you choose on day one is closer to the colourway you will have in year three.
Price vs construction
A hoodie at £40 and a hoodie at £180 are not the same product with different margins. They are different construction decisions at every stage of production — fibre quality, yarn construction, fabric weight, seam type, finishing process.
The £40 hoodie is built to a price. Every decision — open-end spun cotton, 280gsm, single-needle hem, no preshrinking — is made to hit that number. It will perform accordingly.
The £180 hoodie should be built to a specification. Every decision — ring-spun cotton, 400gsm, flatlock seams, garment dyeing, preshrinking — is made to produce a specific result. If the brand cannot tell you what that specification is, the price is not justified by construction. It is justified by branding. These are different things.
As Business of Fashion has noted, the premiumisation of basics is the dominant direction in menswear through 2026 — but premiumisation driven by construction is fundamentally different from premiumisation driven by logo placement. The customer who understands the difference is the customer worth building for.
The echelonn. specification
The aegis. is built to a specification we can state in full: 400gsm 100% ring-spun cotton loop-back fleece. Garment-dyed in washed black and stone. Preshrunk through the dye process. Flatlock seams throughout. Metal grommets at drawstring exits. 2x2 ribbing at cuffs and hem. Oversized fit with dropped shoulder.
The thorax. sweatshirt follows the same fabric specification — 400gsm ring-spun cotton, garment-dyed, preshrunk — in a crew neck construction. The peplos. tee and podea. joggers complete the formation at the same construction standard.
200 units. No restocks. We know what we made and how many. That is the only position worth holding.
FAQ
What GSM should a good hoodie be?
350gsm is the minimum for a heavyweight hoodie. 400gsm is the benchmark for premium construction. Below 300gsm is midweight and will not provide the same structural presence or warmth.
What is loop-back fleece?
Loop-back fleece is a knit construction with a smooth face on the outside and a looped interior. The loops trap warm air and create the soft hand feel associated with quality hoodies. It is distinct from French terry (smaller loops, lighter weight) and polar fleece (synthetic, brushed).
Is ring-spun cotton better for hoodies?
Yes. Ring-spun cotton twists fibres tightly before spinning, producing a denser, smoother yarn that resists pilling and holds its structure at high GSM. Open-end spun cotton is cheaper and coarser — it pills faster and feels rougher at equivalent weight.
What is a flatlock seam on a hoodie?
A flatlock seam is a stitching method where two fabric edges are joined flat rather than folded. The result is a seam that lies flush against the fabric with no raised ridge — more comfortable against skin and more durable under repeated washing.
Should a hoodie be oversized?
Fit is a design decision, not a quality indicator. An oversized hoodie with a dropped shoulder and extended body length is a deliberate silhouette choice. What matters is that the fit is intentional — not that the garment is simply too large.
What hoodie does echelonn. make?
The aegis. is a 400gsm 100% ring-spun cotton loop-back fleece hoodie, garment-dyed and preshrunk. Flatlock seams, metal grommets, 2x2 ribbing at cuffs and hem. Available in washed black and stone as part of HQ 001.
| HQ 001 — first formation | |
|---|---|
 |
aegis. heavyweight hoodie — 400gsm ring-spun cotton, flatlock seams, garment-dyed add to formation |