XGO Phase 1 Flame Retardant Boxer Brief Desert Sand XL 1F13X-XL-700. Our FR is inherent and built-in at the yarn level meaning it won't wash out and provide no melt/no drip protection for the life of the garment. AcclimateDry moisture management and Ag47 anti-microbial/anti-odor will keep you comfortable and odor-free.UtilizingClean Seam flat-seaming to provide a comfortable seam next-to-skin helps reduce the risk of friction and irritation.Lightweight and perfect as a standalone piece or as a layering compliment. Perfect under Nomex to add some breathability and wicking Specifications for XGO Phase 1 Flame Retardant Boxer Briefs: Manufacturer: XGO Age Group: Adults Gender: Male Condition: New Features of XGO Phase 1 Flame Retardant Boxer Briefs Inherently FR At Yarn Level - FR Protection For Life Of Garment ASTM D6413Standard - No Melt/No Drip Superior Acclimate Dry Moisture Management Ag47 Anti-Microbial Protection UPF UV Protection - 25+ Clean Seam Next-To-Skin ComfortDurable Breathable & Wont Shrink. Tagless back label Package Contents: XGO Phase 1 Flame Retardant Boxer Briefs Phase 1 FR Boxer Brief