The Military Mounted Battalion (MMB) requires horse riding breeches that match the color of the Army Service Uniform in accordance with AR 670-1. Color Light Navy/Customs Blue. 840 Shade; Fabric: 4-Way Stretch Fabric. 92% Nylon / 8% Spandex. 16oz Twill; Durability: Breech fabric shall have minimum expected lifespan of 3-5 years under the following circumstances: 3-5 hours of daily riding on all weekdays. Fabric shall have enough stretch to repeatedly mount and dismount a horse without tearing.