In apparel product development, most people focus on fabrics first.

And for good reason.

Fabric determines:

• appearance
• hand feel
• stretch
• overall product positioning

But one challenge that often appears during sample development has nothing to do with the fabric itself.

It's when:

trim development and fabric development move at different speeds.

This issue is common across fashion, sportswear, swimwear, and streetwear brands, yet it remains one of the most overlooked causes of development delays and production risks.

Why Trims Often Lag Behind Fabric Development

In many projects, designers complete the garment design and confirm the main fabric relatively early.

However, trims such as:

• zippers
• buttons
• drawcord tips
• woven tapes
• labels
• hangtags

may still be under development.

Unlike fabrics, trims often require:

• custom molds
• color matching
• material testing
• supplier approval

As a result, trim lead times frequently extend beyond fabric confirmation timelines.

Why Factories Use Substitute Trims During Sampling

To avoid delaying development schedules, many manufacturers will proceed with sample production using alternative trims.

For example:

• a similar zipper
• a temporary button
• a substitute drawcord
• generic labels

This helps keep the sample process moving.

From a development perspective, this can be useful because:

waiting for every trim to arrive may delay sample completion by weeks.

However, this approach introduces several challenges that brands should understand.

Risk 1: The Sample May Not Reflect the Final Product

One of the biggest issues is that:

the sample no longer represents the finished product accurately.

The visual appearance may be close.

But details matter.

A luxury metal zipper and a temporary nylon zipper create different impressions.

Likewise:

• button finish
• drawcord quality
• tape texture

can significantly affect how a product is perceived.

This becomes especially problematic when:

• sales teams evaluate products
• buyers review samples
• collection decisions are made

based on components that won't actually be used in production.

Risk 2: Trims Can Affect Fit and Garment Behavior

Many people assume trims are only decorative.

They are not.

Different trims have:

• different weights
• different stiffness
• different construction methods

A heavier zipper may change how a jacket hangs.

A thicker waistband elastic may alter fit.

A stiffer drawcord can affect drape.

This means:

substitute trims can sometimes influence garment performance and silhouette.

For products where fit is critical, this creates additional development risk.

Risk 3: Trim Delays Can Push Back Bulk Production

Even if the sample is approved,

production cannot begin until all materials are available.

This includes:

• fabrics
• trims
• labels
• packaging

If a trim supplier falls behind schedule,

the entire apparel production timeline may be affected.

Many brands are surprised when:

the garment is approved, but production still cannot start.

The missing component is often not fabric.

It's a trim.

Risk 4: Forecasting Errors Create Inventory Problems

Another challenge appears during purchasing.

If sales forecasts are overly optimistic and trim preparation is insufficient,

brands may encounter:

• trim shortages
• delayed production
• emergency purchasing costs

On the other hand,

if demand is lower than expected,

custom trims may become excess inventory.

This is especially common with:

• custom metal hardware
• branded accessories
• proprietary packaging

Because these materials are usually difficult to reuse across collections.

Why Early Trim Planning Matters

Many development teams treat trims as the final step.

In reality,

high-performing brands often begin trim planning much earlier.

This allows teams to:

• understand lead times
• identify sourcing risks
• align development schedules
• avoid sample compromises

The goal is simple:

make fabric and trim development move together.

How Leading Brands Reduce Trim Development Risk

Brands with strong product development systems often:

Confirm Critical Trims Early

Items with longer lead times are identified before sampling begins.

Standardize Components Across Collections

Using common:

• zippers
• elastics
• labels

reduces sourcing complexity.

Build Buffer Time Into Development Calendars

This helps absorb unexpected supplier delays.

Communicate Continuously With Suppliers

Development becomes smoother when factories, trim suppliers, and brands stay aligned.

How Sundive Apparel Supports Better Product Development Planning

At Sundive, sample development is viewed as more than garment construction.

It is also:

material coordination.

The team works closely with brands to evaluate:

• fabric lead times
• trim sourcing schedules
• production feasibility

before development reaches critical deadlines.

Early Trim Feasibility Review

Before sampling begins, Sundive helps identify:

• custom trim requirements
• supplier lead times
• sourcing risks

to reduce later disruptions.

Sample Development With Production Reality in Mind

Instead of focusing only on appearance,

Sundive evaluates whether:

• trims can scale
• sourcing can support bulk production
• timelines remain realistic

throughout the development process.

Supporting Fast-Moving Apparel Brands

Sundive supports:

• 7–10 day sampling cycles
• ~40 day production timelines
• flexible small-batch development

while helping brands maintain alignment between fabric and trim sourcing.

Final Thought

Many apparel development delays are not caused by fabrics.

And they are not caused by factories.

They happen because:

fabric development and trim development are moving on different timelines.

The earlier brands recognize this,

the easier it becomes to:

• improve sample accuracy
• reduce production delays
• build more reliable launch calendars

Because in apparel development,

sometimes the smallest components create the biggest bottlenecks.