The two-sock strategy works extremely well not only with Lundhags hiking boots but also with other brands. When the socks can move slightly against each other, the friction happens between the socks instead of on the skin, resulting in a much lower risk of blisters. In fact, the use of two socks has been a core design principle, especially with Lundhagsrugged shell boots. This set includes the Lundhags Merino Liner socks and the Merino Trekking Sock Mid hiking socks. - Liner socks: - Soft, fine-knit, and comfortable against the skin - Reinforced with polyamide at the heel, sole, and toe area - 48% Merino wool, 51% polyamide, 1% Lycra - Trekking socks: - Medium thickness - Extra cushioning at the ankle, sole, and toe areas - 60% Merino wool, 37% polyamide, 3% Lycra Both sock pairs are OEKO-TEX certified and made in Sweden.