It's made from 100% Oeko-tex yarn and is woven rather than knitted to keep the bulk down. They are three times as heavy as our standard bamboo booster and absorb three times the quantity of fluid.
In Little lamb wash tests the Small insert absorbed just under three times the water as our standard bamboo booster - and we thought the booster was thirsty!
As there are no seams they dry quickly - quicker than a similar cotton insert.
Being woven, and not knitted, they will shrink up to 10% in size after the first few washes.