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Runhit Boys Thermal Underwear Set, Fleece-Lined Base Layer, Black

Original price was: £19.99.Current price is: £16.98. (as of 10/11/2026 20:52 PST - DetailsProduct prices and availability are accurate as of the date/time indicated and are subject to change. Any price and availability information displayed on Amazon at the time of purchase will apply to the purchase of this product.)

The Runhit Boys Thermal Underwear Set is a black two-piece base layer for kids, with a fleece-lined inner layer, long-sleeve top and full-length bottoms. It uses 88% polyester and 12% elastane, with a close athletic fit, elastic waistband and tag-free crew neck design for layering in cold weather.

SKU: B0HFCKX9WQ Category:

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Not sure yet?Children’s Base Layer Bottoms Buyer GuideRead what to compare before you choose

Quick Summary

The Runhit Boys Thermal Underwear Set is a black two-piece base layer set for kids, with a fleece-lined inner layer and a close athletic fit. It includes a long-sleeve crew neck top and full-length thermal bottoms for layering under everyday clothing and outdoor wear.

The set is described as breathable, quick drying and stretchy, with a tag-free crew neck design and an elastic waistband. It is intended for cold-weather layering and active wear.

Key Details

Detail Verified information and buyer relevance
Brand Runhit.
Product type Boys thermal underwear set / fleece-lined base layer for kids.
Colour Black.
Set contents Long-sleeve crew neck top and full-length thermal bottoms.
Fabric 88% polyester and 12% elastane.
Fit Close athletic fit for layering.
Waistband Elastic waistband with woven lettering.

What to Compare Before Buying

  • Size and fit: This is a kids set with a close athletic fit, so check the chosen size against the wearer’s measurements and preferred layering room.
  • Set contents: The pack includes a top and bottoms. Confirm that you want a full two-piece base layer rather than a single garment.
  • Fabric feel: The blend includes polyester and elastane, which affects stretch and how the set sits under other clothing.
  • Cold-weather layering: It is described as fleece lined for winter layering, so compare it with the level of warmth you want from a base layer.

Before You Decide

Check the size carefully, as the close fit is part of the design. Confirm that you want the black two-piece set with both the long-sleeve top and full-length bottoms. If you need a different level of fit or a single base layer item, choose another option.

Brand

Runhit

Manufacturer

Runhit

Product Group

Apparel

Part Number

UK-FZBS0311452-04

Color

Black

Size

11-12 Years

Number Of Items

1

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