CLIF Builder's - The Entirely Natural Protein Bar. CLIF Builder's is the first delicious high protein bar to pay tribute to those who turn their everyday world into a gym. CLIF Builder's will fuel your muscles with added protein, especially when your day requires a little extra oomph. CLIF Builder's - The uniquely crispy and chewy, high protein bar made with entirely natural ingredients. With 20 grams of the best quality soy and nut proteins, CLIF Builder's is the healthy and convenient way to get more protein into your diet. Whether you're hankering for a convenient and delicious snack that satisfies hunger, or you're interested in muscle health and recovery after physical activity, CLIF Builder's delivers great taste and sound nutrition.