A layer can support different combinations of blades What are the supported blades:

A layer can support different combinations of blades, but the supported blades are Firewall (Network Access Control), Application & URL Filtering, and Content Awareness. These blades provide granular control over network traffic based on applications, users, content, and risk1. Mobile Access is not a supported blade in a layer2.

References: 1: Check Point R81 Security Management Administration Guide, page 101. 2: Check Point R81 Security Gateway Administration Guide, page 11.