Based on the search results, there is no specific product or service called "Fit 4 Life." Instead, Fit 4 Life Health Clubs is a chain of fitness centers with multiple locations across North Carolina. Here are some details about the amenities and services offered by Fit 4 Life Health Clubs:

Positive:

• Open 24/7/365
• Group classes
• Personal training
• Small group training
• Corporate wellness programs
• Kids zone
• Smoothie bar
• In-house supplement store

Negative:

• One Yelp review mentioned that the gym was "always filthy"

Ingredients or materials:

• No information was found about specific ingredients or materials used by Fit 4 Life Health Clubs.