Alpinestars Monster Chase WP Jacket Review http://www.revzilla.com/motorcycle/al... The Alpinestars Monster Chase WP is now being offered in limited quantities. This textile jacket offers a casual sport look with protection against inclement weather with it's built-in waterproofing and removable thermal liner. The Monster comes equipped with CE approved armor in the shoulders and elbows. The Alpinestars Bioarmor Back Protector can be purchased separately for added spine protection.