Sports trunks, or for those who just like their fitted boxers to be longer. As with all Bam underwear, they are ultra soft, comfortable, breathable and very kind to the skin. Also, the trunks are temperature controlled, moisture wicking with ultimate performance! Made from 70% bamboo, 25% cotton, 5% lycra. "Cycled 4000miles and raised over £1600 for Shelterbox in the end. The bamboo stuff is great for bike touring in wild places where I couldn't have a shower for a week at a time on occasions." Mike H, Cornwall For every purchase of a Bam item, you will become the proud, honorary owner of 10 square metres of South American rainforest, brought on your behalf by Bam.