Stretch and recovery answer different questions
Stretch describes how the fabric extends. Recovery concerns how it returns after that extension. For a wearer, both matter: you want room to move, and you also want the neckline, elbows or body shape to sit as intended afterward.
An elastane percentage does not quantify the finished shirt's stretch in every direction. The knit and pattern matter too. A loosely cut tee and a close underlayer can contain similar percentages while giving you very different experiences. Compare garments made for the same role before drawing conclusions.
Example: Woolly’s 95/5 V-neck
Woolly currently lists its Women's V Neck Tee as 95% Australian merino and 5% elastane, with a 175 GSM fabric. Those details belong to that product, not every Woolly tee or every earlier generation sharing a familiar name. Read the current fabric specification.
The 5% elastane makes this a blend, which excludes it if you require an all-wool body fabric. For similar options, compare merino blend shirts by cut as well as percentage.
Use movement to check the pattern
Try reaching forward, lifting your arms and sitting in the way you normally do. A shirt can stretch yet still pull at an inconvenient point because the armhole or shoulder shape does not match you. If the hem rides up repeatedly, do not assume more elasticity will solve it.
Watch the neckline and sleeve openings after you move. You are looking for whether the shirt returns to a position you like without constant adjustment. There is no need to pull the fabric to its maximum extension; that is not how you will ordinarily wear it.
Our fit guide separates useful body ease from unwanted surplus. When buying online, compare a comfortable garment using the measurement guide. A model's stated fit remains more informative than a rule to size down whenever elastane appears.
Do not confuse elasticity with reinforcement
Nylon and elastane are not interchangeable labels. A blend can contain one, both or neither. If your main concern is pack abrasion, investigate the garment's reinforcement claims and construction. If your concern is comfortable movement in a close cut, examine stretch and shape.
The nylon-blend guide explains the different question. This separation helps avoid buying a stretchy shirt for a durability benefit the maker never claimed.
Are elastane and spandex different fibres?
They are names used for the same general type of elastic fibre. Read the full composition of the shirt; terminology alone does not indicate a different fit.
Should I size down in a stretchy merino shirt?
Not automatically. Buy the size that gives the intended fit through normal movement. Stretch should support comfortable use rather than compensate for dimensions that are wrong.
