The Lord 50's are TIM's offering in the middleweight opaques market. They are warm, durable, and quite comfortable. They fall short of an unqualified recommendation because of the conventional seams, and the almost total lack of 'glide' factor to the fabric; they stick to trousers like Velcro! They also suffer from the TIM 'too-high' waistband.
For alternatives, consider our own L4M 820 Opaques, or the Adrian City, which are both more comfortable, and offer better value.
TIM Lord 50 Men's Opaque Tights