The Mountain Equipment LIGHTLINE BOOTIE are extremely warm down shoes, perfect for cold days in base camp or the icy winter room. The DRILITE® Loft 30D outer material reliably keeps out wind and moisture thanks to its PFAS-free DWR impregnation. With 100g of high-quality 90/10 down (minimum 700 cuin) per shoe, they keep your feet nice and warm. The non-slip PU outsole provides a secure grip, while the foam sole and brushed interior ensure additional comfort and warmth. Practical details such as the rear loop, elastic drawstrings for adjustment, and foam insert in the heel make them easy to put on and take off and ensure an optimal fit. Ideal for anyone who doesn't want to compromise on comfort, even in extreme temperatures.