environmentally friendly, child-friendly, best features for long days in the snow . the testy jacket for children is an ecologically designed jacket with an outer material made from recycled polyester. for maximum waterproofing and breathability, it is equipped with a 10k/10k membrane and has a durable water-repellent, pfc-free ecoeliteâ„¢ teflon impregnation. dense thermal dry insulation provides warmth, even on the coldest days of the season.for even more protection and a perfect fit, the cuffs, inner cuffs and snow skirt that can be fixed to the pants are individually adjustable.