This item is set, include top and bottom ( shirt and pants)

If you don't how to choice the size, Tell me your height and weight. We give you suggestion.

What is the different from $123 and $79?

$123 is thicker than $79.If you stay at outside and the tempereture is lower than -10 Degrees Celcius ,buy the $123 is better.

Otherwise choice the $79 is enough.

The $79:http://www.officematics.com/store/product/Men-s-male-100-Pure-Merino-Wool-Outdoor-Winter-sports-Crew-Fleece-Base-Layer-Thermal-Brand/1043997_1395903067.html

• Mens Pure 100% Fine New Merino Wool Outdoor sport Underwear Set-Size 

 Expedition 400gsm

1. 100% 18.5 Micron Merino Wool

2.400 g/m2 Interlock knit construction? Flat lock seams to prevent chafing? Machine washable and machine dryable

3. Available in Men's Sizes: S to XL 

4. Imported

5.Color: Black, Dark Gray

There is sample for selection:

Jack : 175cm 70kg , size M is fit for him;

Sam: 180cm 82kg, size L is fit for him;

Tim:185cm 90kg, size XL is a fit for him. 

This item is set, include top and bottom ( shirt and pants)

If you don't how to choice the size, Tell me your height and weight. We give you suggestion.