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Established 2006. Kent's Only Authorised 5.11 Tactical Retailer

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A base layer built to move

The Magnum Jupiter thermoactive seamless baselayer top is the ideal under-garment for anyone with an on-the-go outdoor lifestyle. Built for comfort, it releases moisture to the outer layers and away from the skin to keep you happy and dry, whether you are skirmishing, hiking or working outdoors.

Seamless, chafe-free comfort

Innovative seamless technology and flat, almost imperceptible seams mean nothing digs in or rubs, even on long days under load. The close, stretchy fit sits smoothly under mid-layers and plate carriers alike.

Smart moisture management

A capillary system pulls sweat through the fabric and out to the surface, while body-map active zones place breathability exactly where your body needs it most. The result is a stable, comfortable micro-climate against the skin.

Lightweight and quick drying

Made from a 75% polyamide, 25% polyester knit, the Jupiter is lightweight, quick drying and resistant to soaking up moisture, so it will not sit cold and damp against you mid-game.

Layer up for the field

Pair it with the matching Magnum long johns and find more base layers and field apparel in our clothing range. Available in adult sizes Large to XXL.

General
BrandMagnum Boots
ColourBlack
Build & furniture
ConstructionSeamless with flat seams
Dimensions
WeightLightweight, quick drying
Other
SizeL, XL, 2XL
ModelJupiter
TypeThermoactive seamless baselayer top
Material75% polyamide, 25% polyester
SizesAdult Large to XXL
SleeveLong sleeve
Moisture controlCapillary system wicks sweat to outer layers
BreathabilityBody-map active zones

Frequently asked questions

What sizes does this baselayer come in?

The Jupiter top is available in adult sizes Large through to XXL. Being a close-fitting seamless base layer, it stretches to hug the body for effective moisture management.

How does it keep me dry?

A capillary system moves sweat and moisture off the skin and out to the garment's outer surface, where it can evaporate. This keeps a comfortable micro-climate against your body during activity.

Is it warm enough for winter skirmishing?

As a thermoactive base layer it regulates temperature and manages moisture rather than acting as heavy insulation. Worn under a mid-layer and jacket it is excellent for cold-weather airsoft and outdoor work.

Will the seams rub during long days?

No. The seamless construction with flat, almost imperceptible seams is designed specifically to reduce chafing and hot spots on long, active days.

What is it made from?

It is a 75% polyamide, 25% polyester knit chosen for stretch, durability and quick-drying performance, with low moisture absorption so it does not stay damp.