Merino wool weights explained: choosing the right wrap

The merino wrap category has expanded considerably in the past few years, and the range of quality is equally wide. A 150 gsm wrap and a 280 gsm wrap are both described as 'merino travel wraps' but they behave very differently in use. Understanding two basic measurements. GSM and micron. Will help you spend your money on something that does what you need it to do.

GSM: weight per square metre ¶

GSM stands for grams per square metre. For a travel wrap, the useful range is roughly 180 to 320 gsm. Below 180, the cloth is more of a scarf than a wrap. It won't provide meaningful warmth in a cool environment. Above 320, you're into blanket territory, which is fine for a throw but awkward to fold into a carry-on.

The wrap we carry at Honeycliff Court is 280 gsm. Toward the heavier end of the travel range. It's warm enough for a cool plane or a September evening on a patio, and it folds to roughly the size of a paperback. That's the balance we were looking for when Ruth sourced it.

Micron: fibre diameter and softness ¶

Micron refers to the diameter of the individual wool fibre. Finer fibres (lower micron count) feel softer against skin. Merino is generally classified as fibres below 24 microns; superfine merino is below 18.5 microns. The difference is noticeable when a wrap is worn against bare skin. A 24-micron cloth will feel slightly scratchy to some people, while an 18-micron cloth typically won't.

The wrap we carry is spun from fibres in the 19.5-micron range, which is soft enough for most people to wear directly against the neck without irritation. If you have a known sensitivity to wool, we'd suggest trying it in the shop before buying. Sensitivities vary and we'd rather you make an informed decision.

Twill weave versus plain weave ¶

The structure of the weave affects drape and durability as much as the fibre itself. A 2x2 twill. Which is what the wrap we carry uses. Has a diagonal rib structure that gives the cloth a fluid drape and makes it more resistant to snagging than a plain weave. It also recovers better from being folded for long periods, which matters for something that spends a lot of time in a bag.

We carry one merino wrap at a time and change the colourway seasonally. The current slate is available now. If you're curious about what's coming next, the best way to find out is to be on our mailing list.