XGO's Phase 1 Lightweight Clothing, our lightest weight option designed for ultimate comfort and performance. This collection includes thermal undergarments and boxer briefs, available in both Flame Resistant (FR) and performance materials. Shop a variety of styles, from long sleeves to short sleeves, crafted for durability and protection, all proudly made in the USA.

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Lightweight Performance T-Shirt (PH1)

Regular Price
$ 43.00
Sale Price
$ 43.00
Regular Price
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Lightweight FR T-Shirt (FR1)

Regular Price
$ 83.00
Sale Price
$ 83.00
Regular Price
Unit Price
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Lightweight FR Cooling T-Shirt (FR1)

Regular Price
$ 94.00
Sale Price
$ 94.00
Regular Price
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Sold Out

Clearance: Lightweight FR Cooling Mesh T-Shirt (FR)

Regular Price
$ 26.00
Sale Price
$ 26.00
Regular Price
$ 105.00
Unit Price
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Lightweight Performance LS Crew (PH1)

Regular Price
$ 49.00
Sale Price
$ 49.00
Regular Price
Unit Price
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Lightweight FR LS Crew (FR1)

Regular Price
$ 90.00
Sale Price
$ 90.00
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Sale

Clearance: Lightweight FR Cooling Mesh LS Crew (FR)

Regular Price
$ 27.00
Sale Price
$ 27.00
Regular Price
$ 110.00
Unit Price
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Lightweight Performance Boxer Brief (PH1)

Regular Price
$ 42.00
Sale Price
$ 42.00
Regular Price
Unit Price
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Lightweight FR Boxer Brief (FR1)

Regular Price
$ 62.00
Sale Price
$ 62.00
Regular Price
Unit Price
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Lightweight Performance Cooling Mesh Boxer Brief (PH1)

Regular Price
$ 46.00
Sale Price
$ 46.00
Regular Price
Unit Price
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Sale

Clearance: Lightweight FR Cooling Mesh Boxer Brief (FR)

Regular Price
$ 18.00
Sale Price
$ 18.00
Regular Price
$ 75.00
Unit Price
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Lightweight Performance Thermal Pants (PH1)

Regular Price
$ 47.00
Sale Price
$ 47.00
Regular Price
Unit Price
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Lightweight FR Thermal Pants (FR1)

Regular Price
$ 88.00
Sale Price
$ 88.00
Regular Price
Unit Price
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Lightweight Performance Neck Gaiter (PH1)

Regular Price
$ 18.00
Sale Price
$ 18.00
Regular Price
Unit Price
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Lightweight FR Neck Gaiter (FR1)

Regular Price
$ 26.00
Sale Price
$ 26.00
Regular Price
Unit Price
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Sale

Clearance: Lightweight Performance Thermal Pants (PH1) - OD Green

Regular Price
$ 11.00
Sale Price
$ 11.00
Regular Price
$ 45.00
Unit Price
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