Here is an overview of carpet construction -

Saxony

•  Soft, smooth cut-pile surface
• Adaptable in performance and appearance
• Suited well to traditional room decor
• Commonly used in formal areas

Textured Saxony

• The textured surface helps hide scuff marks
• Creates a casual appearance
• Style is extremely popular
• Perfect for active familities; can be used in any room

Velvet

• Has a fine tip-sheared surface
• A very formal, elegant style
• Not quite as popular as some other styles

Frieze

• Has a textured surface with a knobbly appearance
• Very durable and long wearing
• Great choice for active rooms

Cut and Loop

• Offers a distinctive, carved appearance
• Cut and loops provide a variety of surface levels
• Multple colors can help hide stains and worm spots
• Can add an interesting accent to rooms
• Lends itself to a variety of room settings

Multi-Level Loop 

• Comprised of several different levels of loops
• Creates pattern effect with a unique appearance
• Affords room a casual appearance
• Very durable weave - hiding traffic well

Level Loop

• Height of loops are all the same
• Usually manufactured with Olefin fiber
• Has a casual appearance, yet it's extremely durable
• Great for family activity rooms or basement floorings.