Semperfli Pro Grade CDC - 1gm Box

Average Contents 110 Large Premium Feathers per Box • 5–6 cm

Semperfli Pro Grade CDC is a premium selection of large, carefully graded CDC feathers chosen for consistency, fibre quality and tying performance. Each pack contains 1gm which average 110 feathers per box of large feathers measuring approximately 5 cm to 6 cm, giving the fly tyer dependable material for high-quality dry flies, emergers, sedges, wings, posts and specialist CDC patterns.

CDC — Cul de Canard — is one of the most effective natural materials in fly tying. Its fine structure, mobility and exceptional ability to trap air make it ideal for patterns designed to sit naturally in or on the surface film.

With 1gm large, consistent feathers per pack, Semperfli Pro Grade CDC gives the tyer more usable fibre per feather and better repeatability from fly to fly.

WHY PRO GRADE CDC?

Not all CDC feathers are equal.

Semperfli Pro Grade CDC is selected for:

• Large feather size

• Approximate length of 5–6 cm

• Strong, usable central stem

• Dense, well-formed fibres

• Good fibre length

• Consistency from feather to feather

• Excellent natural mobility

• High surface-area structure

• Reliable performance in dry flies and emergers

• Efficient use with less sorting and waste

The larger feather size makes it particularly useful when substantial amounts of CDC are needed or when long, even fibres are required.

WHAT IS CDC?

CDC stands for Cul de Canard, traditionally referring to the soft feathers found around the preen-gland area of waterfowl.

These feathers have an exceptionally fine, branched structure that traps tiny pockets of air.

That structure is one of the reasons CDC is so valuable to fly tyers. It can provide flotation, translucency, movement and a soft natural profile without requiring a heavy or bulky dressing.

BENEFITS OF CDC

NATURAL BUOYANCY

The complex structure of CDC fibres traps air and helps flies sit naturally in or close to the surface film.

This makes CDC particularly effective for dry flies, emergers and cripple patterns.

EXTREME MOBILITY

CDC fibres are exceptionally soft and mobile.

Even very small currents and surface movement can make the fibres pulse and move, giving the fly a lifelike appearance.

LOW BULK

A relatively small amount of CDC can create significant volume and movement without making the fly heavy or bulky.

This is especially useful on small flies and delicate presentations.

NATURAL TRANSLUCENCY

CDC allows light to pass through and around the fibres, creating a soft, natural appearance that can imitate wings, emerging insects and trapped air.

EXCELLENT FOR SURFACE-FILM PATTERNS

CDC can be tied so that a fly rides on the surface, hangs in the film or suspends just beneath it.

This versatility makes it particularly valuable when imitating emerging insects.

EASY TO MANIPULATE

CDC can be:

• Tied as a wing

• Rolled into a body

• Twisted into dubbing loops

• Split into thread

• Folded

• Stacked

• Trimmed

• Used as a post

• Used as a collar

• Used as a soft hackle

• Combined with synthetics or natural dubbing

IDEAL USES

Semperfli Pro Grade CDC is ideal for:

• CDC dry flies

• Emergers

• Midge patterns

• Mayfly emergers

• Olive patterns

• Caddis and sedge patterns

• CDC & Elk-style flies

• Klinkhåmer-style flies

• Shuttlecock patterns

• F-Flies

• Bubble-wing patterns

• CDC wings

• CDC posts

• Soft CDC hackles

• CDC collars

• Suspender-style patterns

• Cripple patterns

• Stillwater emergers

• River dry flies

• Small terrestrial patterns

• Split-thread CDC bodies

• Composite dubbing loops

LARGE 5–6 CM FEATHERS

The large feather size gives the tyer greater flexibility.

A single feather can provide enough usable fibre for several smaller flies, while larger patterns can be dressed without needing to combine numerous small feathers.

The longer fibres are particularly useful for:

• Long CDC wings

• Large sedges

• Mayfly wings

• Extended posts

• Larger emergers

• Dubbing loops

• Split-thread techniques

• Larger dry flies

• Stillwater patterns

1gm FEATHERS PER PACK

Each pack contains 1gm carefully selected large CDC feathers (average 110 feathers per box).

This gives the fly tyer a consistent supply of high-quality material without spending time sorting through large quantities of undersized or poorly formed feathers.

Pack contents:

• 1gm Pro Grade CDC feathers

• Approximate feather size: 5 cm to 6 cm

• Carefully selected for fly-tying quality

CDC FAQ

What does CDC mean?

CDC stands for Cul de Canard, the French term traditionally used for the soft feathers found around the preen-gland area of waterfowl.

They have a very fine fibre structure that makes them particularly valuable for fly tying.

How many feathers are in a pack of Semperfli Pro Grade CDC?

Each pack contains 1gm large Pro Grade CDC feathers.

How large are the feathers?

The feathers are approximately 5 cm to 6 cm long.

Why use large CDC feathers?

Large feathers provide longer fibres and more usable material.

They are excellent for larger wings, posts, emergers and dubbing loops, while one feather can often provide material for several smaller flies.

Is CDC naturally buoyant?

CDC is highly effective for floating and surface-film flies because its fine branched fibres trap air.

Its structure also creates a very light, mobile dressing.

Does CDC need floatant?

Good-quality CDC often fishes extremely well without conventional floatant.

Some liquid or gel floatants can collapse or contaminate the fine fibres, so products specifically designed for CDC are generally preferable when treatment is required.

What is the best way to dry CDC after catching a fish?

Blot the fly gently with absorbent material and allow the fibres to recover.

CDC-specific drying powders or desiccants can also help restore performance after the feather becomes waterlogged.

Can CDC be used below the surface?

Yes.

Although CDC is famous for dry flies, it is also highly effective in emergers and subsurface patterns because the fibres trap air and move naturally in the water.

Can CDC be used in a dubbing loop?

Yes.

CDC fibres can be inserted into a dubbing loop and spun to create highly mobile collars, bodies and hackles.

Can CDC be used in split thread?

Yes.

Fine tying thread can be split and CDC fibres inserted into the opening before the thread is twisted.

This produces a very fine, sparse and mobile CDC hackle.

Is CDC good for small dry flies?

Yes.

CDC creates excellent flotation and movement with very little material, making it ideal for small dry flies and midge patterns.

Is Pro Grade CDC suitable for large flies?

Yes.

The 5.5–6 cm feather size makes Semperfli Pro Grade CDC particularly useful for larger dry flies, sedges, mayflies and stillwater patterns.

Can CDC be trimmed?

Yes, but many tyers prefer to tear or pinch fibres rather than make a perfectly straight scissor cut when they want a softer, more natural profile.

What makes good CDC?

High-quality CDC should have:

• Well-formed fibres

• Good fibre density

• Useful fibre length

• A reasonably strong stem

• Natural softness

• Consistent shape

• Minimal damaged or broken fibres

Semperfli Pro Grade CDC is selected specifically for these qualities.

What flies can I tie with CDC?

CDC can be used in an enormous range of patterns, including:

• F-Flies

• CDC emergers

• Klinkhåmers

• Shuttlecocks

• CDC & Elk patterns

• Mayfly emergers

• Midges

• Sedges

• Olives

• Cripples

• Stillwater emergers

• CDC dry flies

Why choose Semperfli Pro Grade CDC?

Because the feathers are large, consistent and selected specifically for fly tying, giving the tyer dependable fibre length, better repeatability and less waste.

1gm large feathers. 5–6 cm. Selected for serious fly tying.