MEETYOOMen’s Thermal Underwear Set, Wicking Long Johns Quick Dry Base Layer Sport Compression Suit for Workout Skiing Running Hiking

Hi everyone. Will these be suited for wild camping at night when it might be very cold. Layering up is key really so 'looking for a warm base layer.

Is this cloth is windproof?

Witch size i need to order 5'11 and 175 lbs(80kg)?

Is M ok for a 32 W and 32 L