Canvas is the oldest thing hemp does well, and the reasons are unusually concrete. It is one of the few natural fibres that is stronger wet than dry — which is why it went to sea before it went to market.
Canvas is sold by grams per square metre, and that single figure predicts how a bag will behave better than any description of it.
| Weight | Feels like | Right for | Wrong for |
|---|---|---|---|
| 200–280 gsm | Soft, drapes, packs small | Tote, shopper, liner | Anything with corners |
| 320–400 gsm | Holds its shape, stands up | Day bag, tool roll, apron | Folding into a pocket |
| 450–550 gsm | Board-like at first, softens | Travel bag, workwear | Anything you carry empty |
| 600 gsm and up | Structural | Sail, awning, floor bag | Domestic sewing machines |
Hemp fibre gains tensile strength when wet, where most fibres lose it. Sails and ships' rope were hemp for exactly this reason, for roughly as long as there have been both.
The fibre is long and the weave is tight, so canvas goes soft and pale at the corners over years instead of tearing. Damage is gradual, visible early, and repairable.
A tight hemp weave holds a wax finish well, so an ordinary bag can be turned into a shower-proof one at any point in its life — and re-waxed when it stops beading.
Shower-proof, not waterproof. It sheds rain for hours and will eventually let water through a seam or a fold. It also stops beading as the wax wears, which is the signal to re-wax rather than a fault.
Considerably, and it is most of the pleasure of owning one. A 400 gsm bag is board-stiff for a fortnight and then starts holding the shape of what you put in it. This is why buying one that feels slightly too rigid is usually the right call.
Yes, unless it has been waxed or treated with softener — both block the dye. Undyed hemp takes natural dyes well and fibre-reactive dyes very well, and the colour ages by fading evenly rather than patchily.
Hemp is stronger for the same weight, resists mildew far better, and grows with a fraction of the water. Cotton starts softer and is cheaper. For a bag that will be carried wet and loaded heavy, hemp wins on every axis but the first afternoon.