# Classic Thermal Merino Base Layer One-Piece

- **Brand:** Smartwool
- **Price:** $250.00
- **Catalog:** zappos
- **Retailer:** zappos
- **Product URL:** https://go.cosimo.shop/r/gAAAAABqxCYMBEwGq4ldLnWknu1sS8FqWKLim5b7TmvfD2UObvqc3pKfSP-BnsPCDZmHae0NfwxrD27l2THy5JodC3WIeQfYNrwD9TiPUuCSs1F_CmceI7pkj54_rSe9opbnt4nAJngNwfAK0NS2Ox8CL3PJknLHKOwcxBRdTZ_7AkHrF9SNEgeaMLgPOMHadLPWcslT3WVs3CtYYvrpKAxYqejC24LLewYwmLi38Iikei_3uOs0QIrNyLLhSwSPwgU_81YYCB2DV_JRbTjSRXWvDhSut699_9XqJZjG3RqPNkTcrP-Ptc2u5hxiMcbq1YavY9wBENnCjLKuxwZ5HxTnm-oZmrC4xbWph1qxkZRgaXqqO1g2uopjmMxp8wDk4WT6Rx8F1IYUEGmtJIQ6xJGBw7-XptCtELT1zmSxzolEXD7mOKVwRXg5W1pm4hwjlWQtyh1QztVtr0OkeKjZV_EE5STT9qe_QXj15HgWwzOYQKMUKsfpoCw=
- **GTIN:** 197803727309
- **Availability:** In stock

## Summary

Men's black thermal merino wool base layer one-piece featuring a mock neck, long sleeves, and a slim-fit interlock-knit construction for moisture management and warmth.

## Description

The ultimate thermal essential, Smartwool® Classic Thermal Merino Base Layer One-Piece. Crafted with slim-fit contours that follow your body's natural shape, this one-piece features a mock neck and long sleeves for full coverage without bulk. The interlock-knit merino fabric excels at moisture management, temperature regulation, and odor resistance, ensuring all-day freshness. Thoughtful design touches like flatlock seam construction minimize chafing, while set-in sleeves and side seams wrapped to the front provide a distraction-free fit for every adventure. Need convenience on the go? The zippered drop seat with a fully functional fly adds practical functionality without sacrificing comfort.

## Appearance

- **Colors:** Black
- **Sizes:** MD, XL (per-size availability under Variants)
- **Fit:** One Size

## Variants

- **In stock:** 2 of 2
- **Available:** XL, MD
- **Color (all variants):** Black

| Size | SKU | Availability |
| --- | --- | --- |
| XL | 10002587 | In stock |
| MD | 10002587 | In stock |

## Categories

- **Categories:** Swimwear > clothing > Clothing > Swimwear

## Additional Attributes

- **sku:** 10002587
- **width:** One Size
- **gender:** Men's, men
- **neckline:** mock neck
- **age group:** adult
- **body type:** REGULAR
- **size type:** standard
- **size group:** Adult
- **size range:** Regular
- **height type:** REGULAR
- **sleeve length:** long sleeves
- **item condition:** https://schema.org/NewCondition
- **if you re not fully satisfied with your purchase you are welcome to return any unworn unwashed items in the original packaging with tags and if applicable the protective adhesive strip intact note:** Briefs, swimsuits and bikini bottoms should be tried on over underwear, without removing the protective adhesive strip. Returns that fail to adhere to these guidelines may be rejected.

## Enrichment

- **Type:** thermal base layer one-piece
- **Type Synonyms:** union suit, thermal bodysuit, long johns one-piece
- **Gender:** male
- **Age Groups:** adult
- **Activewear:** Yes
- **Tags:** mock neck, long sleeves, full length legs, interlock-knit, slim fit, zipper closure, merino wool
- **Styles:** functional, minimalist, athletic
- **Colors:** black
- **Color Families:** Black
- **Category Path:** Apparel & Accessories > Clothing > Underwear & Sleepwear > Sleep & Loungewear > Thermals & Base Layers
- **Fabric:** Merino
- **Insulation Level:** Thermal
- **Pattern:** Solid
- **Canonical Brand:** Smartwool

## Images

- ![Image 1](https://cdn.octogen.ai/0c89cf8c8a7cb255c2f144254622f48e/d430459d8a7ad97da5bca5b61fc8dd49.webp)
- ![Image 2](https://cdn.octogen.ai/0c89cf8c8a7cb255c2f144254622f48e/614a4a5b5476488f3400f10c79d61942.jpeg)
- ![Image 3](https://cdn.octogen.ai/0c89cf8c8a7cb255c2f144254622f48e/7cb7ef4e9bbab5786982ccf7b5885262.webp)
- ![Image 4](https://cdn.octogen.ai/0c89cf8c8a7cb255c2f144254622f48e/36f71c78fdedf893853098097b47a88a.webp)

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*Source: cosimo.shop | Product ID: d29ba5f7-e44e-470a-9c1b-16e4be4b5e21 | Canonical URL: https://cosimo.shop/product/smartwool/classic-thermal-merino-base-layer-one-piece-d29ba5f7-e44e-470a-9c1b-16e4be4b5e21*