UK sizing. Gore-Tex membrane for total water protection. The Lavena Evo is supportive and sturdy enough for use in rocky, bouldery terrain while carrying a heavy backpack. - Women's last and female specific insoles - Lowa Flex structure: despite their great ankle support, the shaft allows forward and backward movement - Surface made of high grade nubuck leather - Vibram Apptrail outsole is great in rocky terrain - I-Lock lace hooks allow for separate tightening of the shaft and lower part - Proper rock protectors at front and rear - Soft cuff structure makes for excellent comfort - X-lacing system keeps the tongue in place both vertically and horizontally - Made in Europe Lowa does not use PFC chemicals in any of their products. You can print [Lowa's size guide](https://backend.lowa.com/media/pages/279dbaf5-f17d-8f8e-f346-2fa87f33af08/f5824c15-4898-7842-05dc-fc1c15437963/67d595c7-df97-d740-ea02-47a08f43b1c9/adae9d706e-1705483145/size_sheet_uni_en_08_21.pdf) and use a credit card