Quality workmanship, excellent cut below the knee and a zip that makes dressing easier, thermal comfort, balanced ratio between the thickness of the material and thermal insulation properties, thermo flex felt too thick compared to nano, more suitable for colder conditions and more fabric than nano. The higher price, however, is balanced by the good quality, features of the covers and, I believe, durability with more regular use. They are very comfortable on the inside, but the treatment of the surface on the outside makes it harder, rougher, so it is important to choose the right size so that the cut of the less adaptable fabric fits well and does not give a stiff impression, something like a thin neoprene that does not fit somewhere. Although they take up more space, their design is no match for light jackets, in cold, wet conditions, those few grams and extra volume will be appreciated by anyone who has frozen to the fable more than once. I recommend, if it is possible, to try on before buying according to the type of figure, which size fits better. Me, for example at a height of 190 cm, 84 kg, the inner length of the legs is 86 cm, the XL size leg warmers fit better than L. Gloves where the XL was too long, the L arm warmers are approx. 45-46cm and is ideal and wide enough for the biceps circumference approx. 31 cm without pressing on the hand and cramping on the waist